Hi Kathryn
Please handle this situation without getting scared. You do not need to feel nervous even if he gets your job info. The person is trying to collect a debt from you and you are required to get the details of the accounts in writing first.
Tell the person to give you the name of the company that is trying to collect this debt. You wish to send a letter asking for debt validation so that you can proceed further towards making the payment. If he won't give any company info, you won't be able to make sure whether the money is going towards the debt account or if they are holding it legitimately.
You might need to record these phone calls so that you have a proof of everything you tried to convey. Tell the person that you are recording the call for legal and fair reasons. If it is a legitimate company, they won't hesitate in giving you in the necessary details.
Did you pull your latest credit report and see if something new is appearing or not?
Regards
Roxette